From 1ed073f178f65e13635db7bf92ebc5c9e61e7fc0 Mon Sep 17 00:00:00 2001
From: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Date: Wed, 13 Aug 2014 15:21:01 +0530
Subject: [PATCH] Drop foreign key anchor in Relation view.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
---
 js/messages.php                |  1 +
 js/tbl_relation.js             | 32 ++++++++++++++++++++++++++++++++
 libraries/tbl_relation.lib.php | 32 +++++++++++++++++++++++++++++++-
 3 files changed, 64 insertions(+), 1 deletion(-)

diff --git a/js/messages.php b/js/messages.php
index 3f4d5933ad..9b676280c8 100644
--- a/js/messages.php
+++ b/js/messages.php
@@ -40,6 +40,7 @@ $js_messages['strTruncateTableStrongWarning'] = __('You are about to TRUNCATE a
 $js_messages['strDeleteTrackingData'] = __('Delete tracking data for this table');
 $js_messages['strDeletingTrackingData'] = __('Deleting tracking data');
 $js_messages['strDroppingPrimaryKeyIndex'] = __('Dropping Primary Key/Index');
+$js_messages['strDroppingForeignKey'] = __('Dropping Foreign key.');
 $js_messages['strOperationTakesLongTime'] = __('This operation could take a long time. Proceed anyway?');
 $js_messages['strDropUserGroupWarning'] = __('Do you really want to delete user group "%s"?');
 $js_messages['strConfirmDeleteQBESearch'] = __('Do you really want to delete the search "%s"?');
diff --git a/js/tbl_relation.js b/js/tbl_relation.js
index 67522ed6d0..2da5b20359 100644
--- a/js/tbl_relation.js
+++ b/js/tbl_relation.js
@@ -115,6 +115,7 @@ AJAX.registerTeardown('tbl_relation.js', function () {
     );
     $('body').off('click', 'a.add_foreign_key_field');
     $('body').off('click', 'a.add_foreign_key');
+    $('a.drop_foreign_key_anchor.ajax').off('click');
 });
 
 AJAX.registerOnload('tbl_relation.js', function () {
@@ -190,4 +191,35 @@ AJAX.registerOnload('tbl_relation.js', function () {
         // Finally add the row.
         $new_row.insertAfter($prev_row);
     });
+
+    /**
+     * Ajax Event handler for 'Drop Foreign key'
+     */
+    $('a.drop_foreign_key_anchor.ajax').on('click', function (event) {
+        event.preventDefault();
+        var $anchor = $(this);
+
+        // Object containing reference to the current field's row
+        var $curr_row = $anchor.parents('tr');
+
+        var question = escapeHtml(
+            $curr_row.children('td')
+                .children('.drop_foreign_key_msg')
+                .val()
+        );
+
+        $anchor.PMA_confirm(question, $anchor.attr('href'), function (url) {
+            var $msg = PMA_ajaxShowMessage(PMA_messages.strDroppingForeignKey, false);
+            $.get(url, {'is_js_confirmed': 1, 'ajax_request': true}, function (data) {
+                if (data.success === true) {
+                    PMA_ajaxRemoveMessage($msg);
+                    PMA_commonActions.refreshMain(false, function () {
+                        // Do nothing
+                    });
+                } else {
+                    PMA_ajaxShowMessage(PMA_messages.strErrorProcessingRequest + " : " + data.error, false);
+                }
+            }); // end $.get()
+        }); // end $.PMA_confirm()
+    }); //end Drop Foreign key
 });
diff --git a/libraries/tbl_relation.lib.php b/libraries/tbl_relation.lib.php
index 6802f30f58..b0a583108d 100644
--- a/libraries/tbl_relation.lib.php
+++ b/libraries/tbl_relation.lib.php
@@ -371,7 +371,8 @@ function PMA_getHtmlForForeignKeyForm($columns, $existrel_foreign, $db,
         . '<legend>' . __('Foreign key constraints') . '</legend>'
         . '<table id="foreign_keys" class="relationalTable">';
 
-    $html_output .= '<tr><th>' . __('Constraint properties') . '</th>'
+    $html_output .= '<tr><th>' . __('Actions') . '</th>';
+    $html_output .= '<th>' . __('Constraint properties') . '</th>'
         . '<th>'
         . __('Column')
         . PMA_Util::showHint(
@@ -428,6 +429,35 @@ function PMA_getHtmlForForeignKeyRow($one_key, $odd_row, $columns, $i,
     $options_array, $tbl_storage_engine, $db
 ) {
     $html_output = '<tr class="' . ($odd_row ? 'odd' : 'even') . '">';
+    // Drop key anchor.
+    $html_output .= '<td>';
+    if (isset($one_key['constraint'])) {
+        $drop_fk_query = 'ALTER TABLE ' . PMA_Util::backquote($GLOBALS['table'])
+            . ' DROP FOREIGN KEY '
+            . PMA_Util::backquote($one_key['constraint']) . ';';
+        $this_params = $GLOBALS['url_params'];
+        $this_params['goto'] = 'tbl_relation.php';
+        $this_params['back'] = 'tbl_relation.php';
+        $this_params['sql_query'] = $drop_fk_query;
+        $this_params['message_to_show'] = sprintf(
+            __('Foreign key constraint %s has been dropped'),
+            $one_key['constraint']
+        );
+        $js_msg = PMA_jsFormat(
+            'ALTER TABLE ' . $GLOBALS['table']
+            . ' DROP FOREIGN KEY '
+            . $one_key['constraint'] . ';'
+        );
+
+        $html_output .= '<input type="hidden" class="drop_foreign_key_msg"'
+            . ' value="' . $js_msg . '" />';
+        $html_output .= '    <a class="drop_foreign_key_anchor';
+        $html_output .= ' ajax';
+        $html_output .= '" href="sql.php' . PMA_URL_getCommon($this_params)
+           . '" >'
+           . PMA_Util::getIcon('b_drop.png', __('Drop'))  . '</a>';
+    }
+    $html_output .= '</td>';
     $html_output .= '<td>';
     $html_output .= '<span class="formelement clearfloat">';
     $constraint_name = isset($one_key['constraint'])